The Geological Characteristics for Pre-Cambrian Shale Gas Accumulation in China

摘要

China has huge shale gas resources potential. The exploitation of shale gas can effectively reduce atmosphere pollution and relieve the energy shortage in China. Organic rich shale in pre-Cambrian period mainly lies to North China and Yangtze areas. The shales were developed in continental shelf and restricted marine basin. The distribution is stable with the thickness ranging from 10m-150m. The geochemistry characteristics are favored for shale gas accumulation for pre-Cambrian shale. The shale mineral is mainly quartz and feldspar. The pre-Cambrian formations have favored geological condition for shale gas accumulation. The favored intervals and regions for development of shale gas are Doushantuo shale in Upper Yangtze areas and Hongshuizhuang shale in northern Hebei Province or Jianchang Basin in western Liaoning Province.